John was piloting a plane behind a car but was never able to overtake it. Why?

What is the next number in the series?

15 29 56 108 208 ?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

What does the below image rebus riddle means ?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?